公开了前所未有的硒催化炔烃的炔丙基氧化。各种炔丙基膦酸酯和3-链烷酸酯通过不寻常的CC三键迁移和乙烯基碳上的硒烯基化反应,有效地转化为有价值的炔酮。通过烯胺中间体的互变异构和S N 2置换的策略,相似的条件对于乙酰胺的氧化双官能化有效,从而提供了具有高区域选择性的多取代恶唑。机理研究揭示了这些详细的过程。
Indium(III) Halide-Catalyzed UV-Irradiated Radical Coupling of Iodomethylphosphorus Compounds with Various Organostannanes
摘要:
The first catalytic radical coupling of iodomethylphosphorus compounds was accomplished with allyl-, alkenyl-, and allenylstannanes under UV Irradiation in the presence of an indium(III) halide catalyst, for which a transmetalated allylic indium species was confirmed lobe an active radical species.
Convenient synthesis of allenylphosphoryl compounds via Cu-catalysed couplings of P(O)H compounds with propargyl acetates
作者:Ruwei Shen、Bing Luo、Jianlin Yang、Lixiong Zhang、Li-Biao Han
DOI:10.1039/c6cc02563c
日期:——
A novel Cu-catalysed substitution reaction of propargyl acetates with P(O)H compounds is developed to afford allenylphosphoryl compounds via C-P bond coupling in high yields under mild conditions. A plausible mechanism...
Copper-Catalyzed Allenylation-Isomerization Sequence of Penta-1,4-diyn-3-yl Acetates with P(O)H Compounds: Facile Synthesis of 1-Phosphonyl 2,4-Diynes
作者:Ruwei Shen、Jianlin Yang、Bing Luo、Lixiong Zhang、Li-Biao Han
DOI:10.1002/adsc.201600684
日期:2016.12.7
The copper‐catalyzed reaction of 5‐substituted penta‐1,4‐diyn‐3‐yl acetates with P(O)H compounds to efficiently give a new class of phosphonyl diynes is reported. The reaction may take place through a regioselective nucleophilic attack of phosphorus nucleophiles on Cu‐allenylidene intermediates to form allenyl intermediates followed by a rapid allene‐alkyne isomerization process. The synthetic utility
Electrochemical selenium–π–acid promoted hydration of alkynyl phosphonates
作者:Bo Li、Yunhao Zhou、Yanan Sun、Feng Xiong、Linghui Gu、Wenbo Ma、Ruhuai Mei
DOI:10.1039/d2cc01901a
日期:——
Unprecedented electrochemical selenium–π–acid promoted hydration of alkynes bearing a phosphonate auxiliary was described. Thus, valuable (hetero)aryl and alkyl ketones could be accessed under mild, metal- and external oxidant-free conditions.